All four of the teenagers involved in Wednesday night's triple fatality crash on M-120 in Dalton Township went to the same party in Twin Lake.

"The reason for the party was the availability of a home with no parents present and they didn't have school the next day," said Muskegon County Sheriff's Lt. Michael Poulin.

The traffic investigator said police were told that alcohol was served and marijuana smoked at the party hosted by a 16-year-old Reeths-Puffer student whose mother was not home. Marijuana was found in the pocket of one of the accident victims, he said.

Poulin said as many as 15 teenagers attended the party. "We're still receiving information about the party," he said.

The three teenagers who died were passengers in a car driven by Jonathan Neiger-Bickham, 19, of 1762 Princess Lane, police said. He did not have a valid driver's license; police said the car was owned by one of the passengers, Terry Antonio Ripley.

Neiger-Bickham turned left on M-120 in front of a fully loaded gasoline tanker truck, according to police. Witnesses told police the truck driver did not have time to stop. They also told police the truck had its lights on.

Police said the truck driver, Pete Anthony Faskey, 62, of Alanson, had just filled his truck at the fuel terminal on M-120 and was headed northeast.

The teens' car was crushed under the front of the semi-truck and dragged several hundred feet down the road. Two of the teens died at the scene and the third at a local hospital.

Neiger-Bickham was pulled from the car and transported to Hackley Hospital. Initially listed as "critical," his condition continues to improve. He was reported in fair condition this morning, according to a hospital official.

The teens who died were identified by police as Shawn David Huq, 16, who was Neiger-Bickham's half-brother; Aaron Lee Pham, 16, of 1844 E. Michillinda; and Ripley, 19, of 1780 Duchess Court.

Princess Lane and Duchess Court are within a mile of the accident scene.

Poulin said that after a request was published in The Chronicle, police started getting calls -- some anonymous -- from people who attended or knew about the party.

"They gave us the name of an individual who was hosting the party. Through our computer system, we tracked that individual down," he said. That portion of the investigation is continuing.

Poulin said police believe all four of the teens had been drinking, but confirmation will have to wait for lab test results. The tests will also check for other drugs.

Neiger-Bickham has yet to be interviewed, police said. Poulin said the teen's driving privileges were suspended. He had not paid a fee that would have reinstated his license following citations that were received in 2006.

"What surprised me ( Thursday morning), was the number of calls I received from parents whose kids never made it home that night," Poulin said.

Also on Thursday morning, deputies obtained dental records from the dentists of the three teens who died and took them to Lansing, where autopsies were being conducted so that "proper identification could be confirmed," Poulin said.

The crash site was mapped forensically Thursday afternoon, and today the two vehicles involved will be checked for evidence.